Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ae7bedade00779…

MALICIOUS

PDF

79.4 KB Created: 2021-03-30 15:37:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5a6326b4d789711d513b36875052f96b SHA-1: c58e35eb02a67b2b17978553164b07ab2f407e52 SHA-256: a6ae7bedade0077904b5c358a0844274c1e0a387b3db4d7339283318d40dcc5b
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious domain, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of common social engineering tactics used to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/award?keyword=apprendre+a+dessiner+gratuitement+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_6054f044eabd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474445/normal_5fdbcc7008936.pdfIn PDF document text
    • http://myyshooop227.site/58332197481erii8.pdfIn PDF document text
    • http://gufutaca1.xyz/19784791135lsb40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460966/normal_5ff18c94b3daf.pdfIn PDF document text
    • http://govejulij.22web.org/sheet_music_beethoven_violin_concerto.pdfIn PDF document text
    • http://wgathering.org/kayla_itsines_28_day_healthy_eatingvatvs.pdfIn PDF document text
    • http://fb-ig-copyright.com/broken_glass_wallpaper_for_android_hdww5kc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459164/normal_603159c1d0189.pdfIn PDF document text
    • http://persequenteamsohbet.com/93362921781qjjim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495254/normal_605a3dae8f876.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ac7cf0-18c3-45c8-84fe-45e07d7f4dfa/setiforosiwokukunafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df443511-fad4-4978-8b9b-d36a94d473cd/internal_revenue_code_501c6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b72bb0a9-65b0-4b2d-b84e-dfdcfc06fa5f/xumezoladazoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8cbca6e-b983-4cfe-b712-97861d4b2acb/war_horse_book_chapter_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c115412a-b99b-4752-8203-048d1086ecd7/what_is_the_timbre_of_music_in_fifths.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9416cfb6-a7b0-460c-962a-cec4b6d30fb0/yamaha_hs80m_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554f641e-40bd-4dfc-bb0b-3ca547f4a053/librecad_autocad_commands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8343ed49-b69f-483a-9653-0276d1f6a122/zajumadufaxibifofilefofib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa03be5-9df2-43a9-8f14-c4eb16c08750/cant_remember_wd_my_cloud_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab3ae6ad-fd07-428f-8934-84e8dcb87502/bodepejibaga.pdfIn PDF document text
    • http://dominomufu.rf.gd/baby_girl_names_2020_with_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dec4946-2e59-4eea-9a12-25d4ecac827b/best_sangean_portable_radio.pdfIn PDF document text
    • http://segoxegigo.epizy.com/submit_form_using_ajax_mvc_5.pdfIn PDF document text
    • http://mukofusakox.rf.gd/python_tutorialspoint_compiler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9b7ec3-c30e-4e67-ab14-f254f77252b4/62934655376.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF469 5320 bytes
SHA-256: 2ce84b235bab5ca0fad702a019b563261981f57a886fbc76e6d38ba27cfb757f
font_01_sfnt_off0001066a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 12928 bytes
SHA-256: 26184096239b59a977a985fe4a09c97548395c149564ab1905b4c647b7eb8a4c

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